Production method of methyl methacrylate
a technology of methyl methacrylate and production method, which is applied in the separation/purification of carboxylic acid esters, physical/chemical process catalysts, and separation processes, etc., can solve the problems of not necessarily economically or industrially advantageous production method, limited scale of methyl methacrylate production plant, and inability to meet the requirements of production, etc., and achieve excellent features
Inactive Publication Date: 2009-08-20
SUMITOMO CHEM CO LTD
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Benefits of technology
[0006]Under such circumstances, the present invention has an object of providing a method of producing methyl methacr
Problems solved by technology
According to investigation of the present inventors, however, plant performance on the scale of 100000 tons or more a year per plant which is economically advantageous in commodity chemicals is usually difficult due to two reasons described below, thus, it is not necessarily economically or industrially advantageous production method.
(2) To collect by transporting mixtures of propyne and propadiene from a plurality of ethylene plants, for increasing propyne feeding amount, is not practical since propyne is a compound containing a triple bond and having a risk of decomposition explosion.
Thus, the scale of the methyl methacrylate production plant is limited to 50000 tons a year per plant at maximum as described above.
Method used
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example 1
[0046]In the case of production of methyl methacrylate via purified propyne to be produced under the following conditions, it can be carried out optimally, for example, according to flow in FIG. 1 and material balance in Tables 1 and 2.
[0047]Numbers in the FIGURE correspond to fluid numbers in the tables.
[0048]Condition (1): In the thermal decomposition step, propane is used as a raw material, and a decomposed gas having a composition of propyne and propadiene of 2 wt % or more is produced according to U.S. Pat. No. 6,333,443.
[0049]Condition (2): The separation step is shared with a separation step of an ethylene plant. Thus, descriptions of hydrocarbon components (fractions) except having 3 carbon atoms are omitted.
[0050]34 T / h of propane (fluid number 1), 10.11 T / h of recovery propanes (fluid number 5) and 44.14 T / h of steam (fluid number 2) are fed to a decomposition furnace of the thermal decomposition step (A) and thermally decomposed, to obtain 88.25 T / h of a decomposed gas (f...
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A method of producing methyl methacrylate comprising the following steps:Thermal decomposition step: a hydrocarbon having 3 or more carbon atoms is thermally decomposed to obtain a decomposed gas having a total content of propyne and propadiene of 2 wt % or more,Separation step: mixed liquid rich in propyne and propadiene is separated from the decomposed gas obtained in the thermal decomposition step,Propyne purification step: the mixed liquid rich in propyne and propadiene obtained in the separation step is subjected to extractive distillation, for separation into purified propyne, and crude propadiene containing propadiene as the main component,Isomerization step: the crude propadiene obtained in the propyne purification step is isomerized in the presence of an isomerization catalyst, to obtain crude propyne containing propyne as the main component, andCarbonylation step: the purified propyne obtained in the propyne purification step is reacted with carbon monoxide and methanol in the presence of a group VIII metal catalyst system, to produce methyl methacrylate.
Description
TECHNICAL FIELD[0001]The present invention relates to a method of producing methyl methacrylate. More particularly, the present invention relates to a method of producing methyl methacrylate, having excellent features such as producing ability on the scale of 100000 tons or more a year and economical. Methyl methacrylate is important as a raw material for synthetic resins and the like.BACKGROUND ART[0002]Japanese Patent Application Laid-Open (JP-A) No. 02-290831 describes a method in which a mixture of propyne and propadiene by-produced in a plant for thermally decomposing a hydrocarbon having 2 to 10 carbons (popular name: ethylene plant) (hereinafter, referred to as ethylene plant in some cases), this plant being carried out for the purpose of producing various petrochemical basic raw materials typically including ethylene, propylene and aromatic hydrocarbons, is taken out by extraction, and this is used as a starting raw material and reacted with carbon monoxide and methanol in t...
Claims
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Login to View More IPC IPC(8): C07C69/54
CPCC07C67/38C07C69/54B01D3/146B01J23/04B01J23/44C07C67/48
Inventor MIZUNO, MASAHIKOSEO, TATEOSUZUTA, TETSUYA
Owner SUMITOMO CHEM CO LTD